Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-09 Thread Sören Vogel
] Different LLRs on multinomial logit models in R and SPSS On Jan 7, 2011, at 8:26 AM, sovo0...@gmail.com wrote: On Thu, 6 Jan 2011, David Winsemius wrote: On Jan 6, 2011, at 11:23 AM, Sören Vogel wrote: Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-07 Thread David Winsemius
On Jan 7, 2011, at 8:26 AM, sovo0...@gmail.com wrote: On Thu, 6 Jan 2011, David Winsemius wrote: On Jan 6, 2011, at 11:23 AM, Sören Vogel wrote: Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me that the actual value of any of the two LLs i

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-07 Thread sovo0815
On Thu, 6 Jan 2011, David Winsemius wrote: On Jan 6, 2011, at 11:23 AM, Sören Vogel wrote: Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me that the actual value of any of the two LLs is indeed important when it comes to calculation of Pseudo-R-S

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread David Winsemius
On Jan 6, 2011, at 11:23 AM, Sören Vogel wrote: Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me that the actual value of any of the two LLs is indeed important when it comes to calculation of Pseudo-R-Squared-s. If Rnagel devides by (some transfo

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread Sören Vogel
Thanks for your replies. I am no mathematician or statistician by far, however, it appears to me that the actual value of any of the two LLs is indeed important when it comes to calculation of Pseudo-R-Squared-s. If Rnagel devides by (some transformation of) the actiual value of llnull then any cal

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread Ben Bolker
Sören Vogel gmail.com> writes: > > Hello, after calculating a multinomial logit regression on my data, I > compared the output to an output retrieved with SPSS 18 (Mac). The > coefficients appear to be the same, but the logLik (and therefore fit) > values differ widely. Why? Since constants t

Re: [R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread David Winsemius
On Jan 6, 2011, at 11:06 AM, Sören Vogel wrote: Hello, after calculating a multinomial logit regression on my data, I compared the output to an output retrieved with SPSS 18 (Mac). The coefficients appear to be the same, but the logLik (and therefore fit) values differ widely. Why? The likeli

[R] Different LLRs on multinomial logit models in R and SPSS

2011-01-06 Thread Sören Vogel
Hello, after calculating a multinomial logit regression on my data, I compared the output to an output retrieved with SPSS 18 (Mac). The coefficients appear to be the same, but the logLik (and therefore fit) values differ widely. Why? The regression in R: set.seed(1234) df <- data.frame( "y"=fa